<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <!-- 添加商品分类按钮 -->
          <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
        </el-col>
        <!-- 渲染商品分类表格 -->
        <tree-table
          class="goodsCate"
          show-index
          index-text="#"
          :show-row-hover="false"
          :expand-type="false"
          :selection-type="false"
          :data="categoriesList"
          :columns="columns"
        >
          <template slot="isok" slot-scope="scope">
            <!-- <pre>{{scope.row}}</pre> -->
            <i
              class="el-icon-success"
              v-if="scope.row.cat_deleted===false"
              style="color:lightgreen"
            ></i>
            <i class="el-icon-error" v-else style="color:red"></i>
          </template>
          <template slot="order" scope="scope">
            <el-tag v-if="scope.row.cat_level==0">一级</el-tag>
            <el-tag type="warning" v-else-if="scope.row.cat_level==1">二级</el-tag>
            <el-tag type="danger" v-else-if="scope.row.cat_level==2">三级</el-tag>
          </template>
          <template slot="opl" scope="scope">
            <el-button size="mini" type="primary">编辑</el-button>
            <el-button size="mini" type="danger">删除</el-button>
          </template>
        </tree-table>
        <!-- 分页 -->
        <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="queryInfo.pagenum"
          :page-sizes="[3, 5, 10, 15]"
          :page-size="queryInfo.pagesize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total"
        ></el-pagination>
      </el-row>
    </el-card>
    <!-- 添加商品分类对话框 -->
    <el-dialog
      title="添加商品分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <el-form :model="addCateForm" :rules="addCateRules" ref="addCateFormRef" label-width="100px">
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类">
          <el-cascader
            v-model="selectedKeys"
            :options="parentCateList"
            :props="cascaderProps"
            @change="parentCateChanged"
            clearable
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      categoriesList: [],
      total: 0,
      columns: [
        {
          label: "分类名称",
          prop: "cat_name"
        },
        {
          label: "是否有效",
          //   prop: "cat_deleted",
          type: "template",
          template: "isok"
        },
        {
          label: "排序",
          type: "template",
          template: "order"
        },
        {
          label: "操作",
          type: "template",
          template: "opl"
        }
      ],
      addCateDialogVisible: false,
      addCateForm: {
        cat_name: "",
        cat_pid: 0,
        cat_level: 0
      },
      addCateRules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" }
        ]
      },
      parentCateList: [],
      cascaderProps: {
        expandTrigger: "hover",
        checkStrictly: true,
        value: "cat_id",
        label: "cat_name",
        children: "children"
      },
      selectedKeys: []
    };
  },
  created() {
    this.getCategoriesList();
  },
  methods: {
    async getCategoriesList() {
      const { data: res } = await this.$http.get("categories", {
        params: this.queryInfo
      });
      //   console.log(res);
      if (res.meta.status != 200) return this.$message.error(res.meta.msg);
      //   this.$message.success(res.meta.msg);
      this.categoriesList = res.data.result;
      this.total = res.data.total;
      //   console.log(this.categoriesList);
    },
    handleSizeChange(pagesize) {
      this.queryInfo.pagesize = pagesize;
      this.getCategoriesList();
    },
    handleCurrentChange(pagenum) {
      this.queryInfo.pagenum = pagenum;
      this.getCategoriesList();
    },
    showAddCateDialog() {
      this.getParentCateList();
      this.addCateDialogVisible = true;
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: {
          type: 2
        }
      });
      //   console.log(res);
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.parentCateList = res.data;
      //   console.log(this.parentCateList);
    },
    parentCateChanged() {
      //   console.log(this.selectedKeys);
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1
        ];
        this.addCateForm.cat_level = this.selectedKeys.length;
      } else {
        this.addCateForm.cat_pid = 0;
        this.addCateForm.cat_level = 0;
      }
    },
    async addCate() {
      //   console.log(this.addCateForm);
      const { data: res } = await this.$http.post(
        "categories",
        this.addCateForm
      );
      //   console.log(res);
      if (res.meta.status != 201) return this.$message.error(res.meta.msg);
      this.$message.success(res.meta.msg);
      this.getCategoriesList();
      this.addCateDialogVisible = false;
    },
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields();
      this.selectedKeys = [];
      this.addCateForm.cat_pid = 0;
      this.addCateForm.cat_level = 0;
      //   console.log(this.addCateForm);
    }
  }
};
</script>
<style lang="less" scoped>
.el-button,
.goodsCate {
  margin-bottom: 15px;
}
</style>